| RefNo | Title | Date |
| EC/1912/02 | Barkla, Charles Glover: certificate of election to the Royal Society | |
| NLB/54/903 | Copy letter from Dr. Arthur Schuster, Secretary of the Royal Society; to Professor [Charles Glover] Barkla, FRS | 1 November 1917 |
| NLB/63/594 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Charles Glover] Barkla, FRS | 10 November 1922 |
| NLB/54/102 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [Charles Glover] Barkla, FRS | 6 February 1917 |
| NLB/53/209 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor C. G. Barkla, FRS | 26 May 1916 |
| NLB/53/232 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [Charles Glover] Barkla, FRS | 05 June 1916 |
| NLB/54/727 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Arthur] Schuster, Secretary of the Royal Society | 24 August 1917 |
| RR/27/81 | Referee's report by Charles Glover Barkla, on a paper 'Constitution of the X-ray spectra belonging to the L series of the elements' by H Hirata | December 1922 |
| RR/27/113 | Referee's report by Charles Glover Barkla, on a paper 'On the excitation of characteristic X-rays from light elements' by John Cunningham McLennan and M L Clark | July 1922 |
| NLB/53/233 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [Charles Glover] Barkla, FRS, Physical Laboratory, The University, Edinburgh | 05 June 1916 |
| NLB/53/160 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [Charles Glover] Barkla, FRS | 12 May 1916 |
| NLB/55/333 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [Charles Glover] Barkla, FRS | 28 February 1918 |
| NLB/59/186 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [Charles Glover] Barkla, FRS | 24 July 1920 |
| NLB/59/901 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [Charles Glover] Barkla, FRS | 27 November 1920 |
| RR/16/256 | Referee's report by Joseph Larmor, on a paper 'Polarised röntgen radiation' by Dr Charles Glover Barkla | February 1905 |
| RR/48/7 | Referee's report by Charles Glover Barkla, on a paper 'On the purity and intensity of the radiation from an x-ray crystal monochromator' by G I Harper | [July 1933] |
| RR/25/45 | Referee's report by Charles Glover Barkla, on a paper 'On the velocities of two distinct groups of secondary corpuscular rays produced by a homogeneous Rontgen radiation, and their absorption coefficients in various gases' by Lewis Simons | [November 1918] |
| RR/54/108 | Referee's report by Charles Glover Barkla, on a paper 'The structure of benzoquinone. A quantitative X-ray investigation' by John Monteath Robertson | February 1935 |
| RR/52/23 | Referee's report by Charles Glover Barkla, on a paper 'X-ray studies of the structure of hair, wool, and related fibres - III—The configuration of the keratin molecule and its orientation in the biological cell' by William Thomas Astbury and Wayne A Sisson | February 1935 |
| NLB/63/81 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Charles Glover] Barkla, FRS | 22 June 1922 |
| NLB/63/696 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Charles Glover] Barkla, FRS | 04 December 1922 |
| NLB/65/394 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Honourable Sir Charles [Algernon] Parsons, KCB, FRS; also sent to Professor [Charles Glover] Barkla, Professor [Arthur Stanley] Eddington, Sir [William Henry] Bragg, Professor [Thomas Ralph] Merton, Professor [Jocelyn Field] Thorpe, Sir [Frederick William] Andrewes, Professor [Edwin Stephen] Goodrich, Sir [Thomas Henry] Holland and Sir [Frederick William] Keeble. | 25 October 1923 |
| RR/16/257 | Referee's report by John Sealy Edward Townsend, on a paper 'Polarised röntgen radiation' by Charles Glover Barkla | 6 February 1905 |
| NLB/54/909 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to the Deputy Master of the [Royal] Mint | 2 November 1917 |
| RR/65/282 | Referee's report by Charles Glover Barkla, on a paper 'X-ray studies of the structure of hair, wool, and related fibres. IV. The molecular structure and elastic properties of the biological cells' by H J Woods | February 1938 |
| MS/603/1/59 | Letter from C G [Charles Glover] Barkla, Hermitage of Braid, Edinburgh, to Sir Joseph [Larmor] | 18 May 1925 |
| RR/40/74 | Referee's report by Charles Glover Barkla, on a paper 'The emission of electrons under the influence of chemical action at lower gas pressures' by Owen Willans Richardson and L G Grimmett | October 1930 |
| RR/56/7 | Referee's report by Charles Glover Barkla, on a paper 'On crystal and slit systems for X-ray monochromatization and spectroscopy' by G I Harper | [December 1934] |
| MS/603/1/57 | Letter from C G [Charles Glover] Barkla, Littledene, Priestfield Road, Edinburgh, to Sir Joseph [Larmor] | 8 March 1915 |
| MS/603/1/58 | Letter from C G [Charles Glover] Barkla, Hermitage of Braid, Edinburgh, to Sir Joseph [Larmor] | 15 October 1922 |
| MS/603/1/60 | Letter from C G [Charles Glover] Barkla, Physical Laboratory, the University, Edinburgh, to [Joseph] Larmor | 27 June 1927 |
| MC/20 | Volume 20 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1905 |
| MC/20/427 | Letter from [Joseph John] Thomson, Cavendish Laboratory, Cambridge, to the Royal Society | 20 January 1905 |